Liner puller



N. 1.. STOUT ET AL 2,487,902

Nov. 15, 1949 LINER FULLER Filed Nov. 20, 1947 6 B 0 4 Mm Wm m zfi W\\\\\\\\\\\\\\\\\\\A% i, W

mentors Norman L. Stout Dewey E. Owens Nov. 15, 1949 sTouT ET AL2,487,902

LINER FULLER Filed NOV. 20, 1947 2 Sheets-Sheet 2 36 32 I i H 4,

,8 III Fig.5.

Inventors Nor/flan L Slow Dewey E. Owens Patented Nov. 15, 1949 UNITEDSTATES-PATENT? OFF CE.

i ,7 1 This invention relates to new and useful improvements in linerpullers, and the primaryob- 'ject of the present invention is to providea device for removing sleeves or linings from pump cylinders or the likeof various diameters.

Another important object of the present invention is to provide a linerpuller including novel and improved gripping jaws so designed as tofrictionally grip the lining of a cylindrical pump as the puller isextended through the pump cas- A further object of the present inventionis to provide a pump lining extractor embodying novel and improved meansfor actuating the gripping jaws thereof to uniformly engage the innerperiphery of a lining without slipping movement relative thereto.

A still further aim of the present invention is to provide a linerpuller that is simple and practical in construction, strong and reliablein use, relatively inexpensive to manufacture, and otherwise welladapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction andoperation as more fully hereinafter described and claimed, referencebeing had to the accompanying drawings forming part hereof, wherein likenumerals refer to like parts throughout, and in which:

Figure 1 is a longitudinal fragmentary vertical sectional view through acylinder, such as a pump cylinder, and showing the present inventioninstalled therein for pulling a lining from the pump cylinder;

Figure 2 is a transverse horizontal sectional view taken substantiallyon the plane of section line 22 of Figure 1;

Figure 3 is a plan view of one of the gripping jaws used in conjunctionwith the present invention, and with parts broken away and shown insection;

Figure 4 is a perspective view of the piston rod engaging member used inconjunction with the present invention; and V Figure 5 is an elevationalview of the present liner puller in slightly modified form, and withparts thereof broken away and shown in section.

Referring now to the drawings in detail, wherein, for the purpose ofillustration, there is disclosed the preferred embodiment of the presentinvention, the numeral l0 represents a substantially cylindrical bodyopen at both ends and provided with a fixed bearing plate l2intermediate its ends, upon one face of whic there is supported the baseportion iii of a hydraulic jack [4.

V HutchinsoniKans. I v v 1 Application November 20,1947, Serial No.787,170

'1 Claim. (61.29-283) The movable shaft or rod it of this jack i4 isconnected to a base member ll having a plurality of spaced ears orfulcrums I8 that pivotally engage the inner terminal 20 of a group ofradial arms 22, which are circumferentially spaced relative to eachother.

The numeral 24' represents a plurality of armate jaws each having anouter toothed surface 26, an angular flanged portion 28, and in integralshank portion 30 fixedly carried by the flange 28 that is provided withan eye portion 32. The eye portions 32 of the shanks 30 are providedwith central slots 34 that pivotally engage the free terminal 36 of arms22.

Circumferentially spaced, longitudinal slots 38 are provided in one endof the body In and these slots oppose the openings between pairs ofspaced ears or retaining plates 40 that are rigidly secured to the innerperiphery of the body In and which are provided with opposed apertures42 that pivotally engage the inner terminals 44 of a plurality of radiallinks or connecting arms 46. The outer terminals 48 of these arms 46 arebifurcated to pivotally engage the eye portions 32 of the jaws 24.

In practical use of the device, the lower portion or chamber 50 providedin the body Ill engages the end 52 of a piston rod 54 that is movable orworkable in the lining 56 of a pump casing or cylinder '58, and the jackI4 is operatively connected by a supply hose 59 to a hydraulic jack pump60, so that by actuating the lever 62 of the pump- 60, the base memberI! will spread relative to the body Ill and the jaws 24 and arms 22 willpivot downwardly to frictionally engage the inner periphery of thelining 56 to remove the lining from the casing 58 as the piston rod 54is actuated to force the body I0 through the pump cas- Reference is nowdirected to Figure 5, wherein there is disclosed the present linerpuller in slightly modified form. In this embodiment, the hydraulic jack[4 is removed from its position between the base member I! and the bodyl0 and is replaced by a coil spring 60 that is fixedly secured at itsopposite terminals 62 and 64 to the base and the bearing plate l2,respectively. In this instance, as the body 10 is forced through thepump lining by the piston rod 54, the spring 60 will urge the baseoutwardly from the body In to pivot arms 22 and jaws 124 downwardly,thus causing the jaws 24 to frictionally grip the inner periphery of thepump lining to remove the same from the pump casing, as the piston rodforces the body I 0 through the pump lining.

In view of the foregoing description taken in conjunction with theaccompanying drawings, it is believed that a clear understanding of thedevice will be quite apparent to those skilled in this art. A moredetailed description is accordingly deemed unnecessary.

It is to be understood, however, that even though there is herein shownand described a preferred embodiment of the invention, the same issusceptible to certain changes fully comprehended by the spirit of theinvention as herein described and within the scope of the appendedclaim.

Having described the invention, what is claimed as new is:

A lining extracting device comprising an open ended tubular supportprovided with a fixed transverse bearing plate intermediate its ends,said support also having a plurality of circum ferentially spaced slotsat one end, arms having rapper and wiv s and Human t e ow r a n rtiqnsof said arms being received in said slots to! wa in mov m nt and r ve eda d pent, va g e 9 e eumfe snfi ll Spaced pp Jaws having per eee th uper n Po tions of said arms being pivoted to the shanl portions of saidjaws, a base member spaced above said support, links terminally pivotedto said base member and the shank portions of said jaws, and a jackdisposed on said transverse bearing plate between said support and saidbase, said jack having a movable shaft abutting said base member.

NORMAN L. STOUT.

E. OWENS.

REFERENCES CITED The following references are of record in the file ofthis patent:

STATES PATENTS we ry May 19, 1

